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Subway power supply system dynamic risk analysis and evaluation method based on fuzzy reasoning

A power supply system and dynamic risk technology, which is applied in the field of dynamic risk analysis and evaluation of subway power supply system based on fuzzy reasoning, can solve the problems of failure to reflect the evolution process of risk propagation of the system, lack of failure mechanism description, etc., to improve stability and safety Effect

Active Publication Date: 2019-05-21
TSINGHUA UNIV
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Problems solved by technology

This type of method can describe the risk of the system to a certain extent, but its disadvantage is that it cannot reflect the evolution process of the system's risk propagation, especially the lack of description of the failure mechanism

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  • Subway power supply system dynamic risk analysis and evaluation method based on fuzzy reasoning
  • Subway power supply system dynamic risk analysis and evaluation method based on fuzzy reasoning
  • Subway power supply system dynamic risk analysis and evaluation method based on fuzzy reasoning

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Embodiment Construction

[0031] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0032] Before understanding the gist of the invention of this application, it is necessary to understand the subway power supply system. The electric energy of the whole subway comes from the subway power supply system. From the perspective of different functions, the subway power supply system is composed of external power supply, main substation, traction power supply system, stray current corrosion protection system, power monitoring system, power The lighting power supply system consists of six systems. The traction power supply system is the core part of the...

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Abstract

The invention relates to a subway power supply system dynamic risk analysis and evaluation method based on fuzzy reasoning, and the method at least comprises the steps: S1, determining a DC feed-out cable and a return cable of a target DC substation according to a power supply section of a track position where a target train is located; S2, establishing a risk transmission chain of direct-currentcable breakdown of the subway power supply system, and determining the key characteristic quantity of a direct-current feed-out cable in the risk transmission chain; S3, taking the obtained key characteristic quantity value of the direct current feed-out cable as a value vector, and carrying out fuzzy set calculation through a fuzzy reasoning method to obtain a membership function diagram corresponding to the value vector; and S4, reasoning according to the membership function diagram of each numerical vector to obtain a possibility observation diagram of direct-current cable breakdown. The method can reasonably evaluate the risk level of the system and block the propagation evolution of a risk propagation chain, thereby avoiding major accidents as much as possible.

Description

technical field [0001] The invention relates to a risk analysis technology for a subway power supply system, in particular to a dynamic risk analysis and evaluation method for a subway power supply system based on fuzzy reasoning. Background technique [0002] With the rapid development of my country's subway, the safety of subway operation has aroused people's high attention. As the power source of the subway train, the power supply system of the subway is mainly responsible for providing continuous power to the train to ensure the stable operation of the train. According to statistics, in recent years, subway safety accidents due to power supply factors rank second among all accident causes, and once the power supply system fails, it will not only cause the train to fail to run, but may also endanger the safety of passengers and cause serious consequences. Therefore, the safety risk of the subway power supply system is particularly important. For this reason, scholars hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G06N5/04
Inventor 孙新亚郭丽丽董炜吉吟东
Owner TSINGHUA UNIV
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